Sectional barrel for oil-well pumps



March 2o, 192s'.y

J. A. ZUBLIN SECTIONALl BARREL FOR OIL WELL PUMPS Filed Feb. 16,. 1925Patented Mar.' 20, y1928.

-UNITED STATES JOHN A. ZUBLIN, F LOS ANGELES,'CLIFORNIA.

SEVCTIONAL BARREL FOR OIL-WELL PUMPS;

Application led February This invention relat/es to the oil producingindustry, and it particularly concerns oil well pumps.

It is customary to pump oil 4from a well by 5 means of a pump situatedat the lower end 'thereoi- The .working barrel of such a pump is securedat the lower end of a pump tubing which extends upwardlyIthroughthewell, and the pump plunger of such a pump l0 is attached yatthe lower end of a string'- of sucker 'rods which extends upwardlythrough the pump tubing and is connected with a walking beam, whichwalking beam recipro- 'cates the pump plunger by means of the suckerrods. v

There are several types of working barrels forpumps of this character,such as one' piece barrels and liner barrels. A onepiecebarrelconsists/'pf a tubular member of one length whiclrZrs-bored andreamed to proper size. A line/1i barrel consists of an outer jacket inwhich a plurality of short liners is assembled. These liners arefinished to proper size and are secured in alignment inside'the jacketby means of upper and lower collars which are secured to the ends of thejacket..

Itis sometimes desirable to increase the length of the pumping stroke ofthe plunger 3U. in order to increase the production of the well. Inorder to make such an increase, it is necessary to have a working barrelwhich is proportionately longer.

and should such an increase in the pumping stroke be provided, thebarrel must bere Y It is an object ofmy invention to provide a workingbarrel which may be lengthened as desired and which may be lengthened onthe job. When the pumping stroke is increased the working barrel of myinvention may be facilely increased accordingly.

It is another object of my invention to provide a. sectional workingbarrel. I provide my invention'inthe form of a number of tubularsections and collars for securing said sections together. When it isdesired to lengthenl the working barrel, an additional section isincluded in such barrel.

It is also an object of my invention to provide a Vsectional workingbarrel of this character which ls so constructed-that the see- Inthe.present' Itypes of barrel, the lengths are standard thereof toaccommodate the pumping stroke.

'l1- 4 of Fig. 2.

16, l1925. Serial N0.9,673.

tions may be accurately aligned in absolutely fluid-tight relationship.vEach end of each of thesect-ions is .accurately turned down and groundso as to provide a sleeve portion, andvadjacent to each of the sleeveportions 1s provided a male thread formation. lEach of the collars isprovided with a centra-l cylindrical portion whichv is accurately ground-to a( size. corresponding with the sleeve portions ofthe sections.\Adjacent to the central cylindrical portion is provided female threadportions. The fit between the sleeve portions" and the central portionlis an accurate sliding lit, whereas t-he lit between the male and femalethread portions is a' lVhcn two sections are secured to`` loose fit.gether by a coupling, the sleeve portions thereof extend intothecylindrical portion of the collar, and the male thread portions arethreaded into the female thread portions of the collar. The sectionsarethreadedinto the collar until the adjacent ends thereof,

which are accurately ground, abut. This abutment between the ends andtheclose fit between the sleeve portions and the central cylindricalportion renders the barrel fluidtight. By providing an accurate. fitbetween the sleeve portions and the cylindrical Vportions an accuratealignment between' the various sections is provided, and by making themale and female thread portions of a loose fitting Dnat-ureany-inaccuracy of the threads will not be effective in throwing thesections out of alignment.

Otherobj'ects and the especial advantages of my invention will appear inthe following description.

Referring to the drawing whichuis for illustrative purposes only,

utility of myinvention.

Fig. 2 is 'an enlarged fragmentary' sectional View showing a workingbarrel emj bodying the features of my invention.

' 100 Fig. 3 is. an enlarged fragmentary sec-l tional view clearlyshowing the collar construction and the lend construction of thesections.

Fig. 4 1s an enlarged cross sectional vlew taken substantially asindicated by the line -tendng through the pump tubing 12 is a.

sucker rod string 14, this sucker rod string I show a pump lllsecured i'Fig. 1 is a diagrammatic View showing the `3, botliends of each section20 are provided vwith a sleeve portion 25. This sleeve portion 25 has anouter. face which is concentric with an inner face 26 of each of the.sec` tions 20, and which is accurately ground to a certain size. 20 isalso accurately finished olf and ground.

'Adjacent to each of the sleeve portionsv 25 is formed a male threadportion 30.. When adjacent sections are secured together by a 'collar21, sleeve portions 25 of these adjacent sections 20 extend into acentral cylindrical portion 32. This central cylindri- -cal portion 32is ground so as to be an accurate close tit with respect to the outerfaces ,'27 of the sleeve portions 25. The. male thread portions 30engage female thread vportions 33formed"in a collar 21 at eachside ofthe central cylindrical portion 32. The male threads 30 and 'the femalethreads 33 are of a loose fitting relationship, as clearly shown in Fig.3.A The male thread portions 30 are screwediuinto the female -rthreadportions 33 .until ends 28 of the' sections 20 contact each other, asshown in Flg. 3, these ends'being tightly clamped together.

I. tweenthe male and female thread ,forma-5 lois The features ofproviding accurate slidingv tsbetween the sleeve portions 25 and thecentral cylindrical portion '32, and providing a loose fit between eachof the thread portions 30 and 33 assure the accurate aligning of each oftheV sections 20.y The accuracy of fit between the portions 25 and32assures aligning, and by providing a -loose lit betions nointerferenceto lthis alignment can be present because oflany'inaccuracies .in the threads. The forcefull contactbetween theabutting ends 28 assuresa non-leakage of the barrel betweenadjacentnsections 20.

When machinlng a section 2() it is held 55 by a suitable' chuck atthe'center thereofand the inner face 26 is accurately finished to size.The thread formations 30 andv the sleeve portions 25 are also turned andiin-- ished 'accurately to size without] removing the section from vthechuck. In this manner the inner face 2 6, the face 27 of the sleeveportion 25 and the thread formations 30 are all formed concentricallyand absolutely true. l.

The upper collar 19 is provided 'with a cylindrica `portion 40 and afemale threaded Each end 28 of each section.

portion .41 to permit a securing of an upper o f the sections v20thereto, and the lower col- "lar 22 is provided 'with a 'cylindricalportion 42 and a female portion 44 to permit a securing of a lower ofthe' sections .20.:

From the drawings' and description 1t 1s evident that a sectionalworking barrel of my invention is of practical construction and providesa valuable Jfeature not possessed by the present working barrels. It isobvious.

that by adding a desired number of'sections to the barrel the length ofthe barrel may be increased as desired. Further, this ad dition may bemade at thewell due' to the simple construction of the sections andcollars, which assures an accurate aligning and non-leakage.

Although I-have shown a single embodiment of my invention, it should beclearly understood that various modificaations 'and various otherconstructions may .be made entirely by the appended claims.

I- claimas my invention: f

1. In combination Hin an oil well pump, a working barrel .comprising:` aplurality of .without departing from the spirit'and scope of myinvention which should be construedsections, said sections having sleeveportions ateach end thereof and havingmalethread vformations adjacent tosaid sleeve portions;v and collars for holding` adjacent sections to'gether, each ofsaid collars' having a central cylindrical portion intowhich sleeve portions of adjacent sections extend and female vthreadformations into which male thread formations of adjacent sectionsthread, en-

gagement between said 'male and female.

portionsV holding the ends of saidv adjacent sections in abuttingrelationship.

' 2. A combination as in claiml in which said sleeve portions and saidcylindrical portions are a ground fit. l

3. A combination as in claim 1 in ,which said male and femalethread-formations are alooseffit.- 1

\ 4. In combination in an oil well pump, a`

working barrel comprising: a plurality ofl` sections, said sectionshaving sleeve portions at each end thereof Aand having maley thread.formations adjacent to said sleeve portions;

and collars -for holding vadjacent sections together, each ofsaidcollars having a central cylindrical;= portion into which sleevep'o'rtions' of adjacent sections extend,` and with which central(portion said sleeve portions. form a groun it, and female threadformations into Vwhich said male thread for:v mations of adjacentsections thread, said'l thread formations engaging with a loose iit`-said engagement holding the ends of saidl vadjacent sections in abuttingrelationship.

'In testimony'whereof, I have hereunto set my hand atLos Angeles,.California, this 9th day of February, 1925.'

JOHN A.- ZUBpiN'. l I

